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Magnetic ballasts are a legacy technology and use inductance to transform the line voltage to the voltage required to "fire" or excite the gasses in a lamp. Electronic ballasts use a variety of starting methods, and are more efficient than magnetic ballasts in converting input power to the proper lamp power and operate fluorescent lamps at higher frequencies, resulting in an overall lamp-ballast system – increasing efficacy 15% to 20% over a magnetic equivalent.

Ballast Type

High Power

Replacement Lamp

High Pressure Sodium

Length (in)

Also referred to as "Maximum Overall Length" (MOL). For light bulbs, it measures the length of a light bulb, from the top of the bulb to the bottom of the base or pins and is typically expressed in inches. For light fixtures and ballasts, it applies to the total horizontal length of the item.

Length (in)

18.125

Width (in)

For fixtures and ballasts, width is the measurement of the total horizontal distance from left to right of the product in inches.

Width (in)

9.063

Height (in)

For ballasts and fixtures, height is the measurement of total vertical distance from the top of the product to the bottom expressed in inches.

Dark Sky Compliant products have been approved by the International Dark Sky Association (IDA), which ensures that the Upward Light Output Ratio of the product is deemed "full cut-off" or "fully shielded". This means that the luminous intensity (in candelas) at or above an angle of 90 above nadir is zero, and the luminous intensity (in candelas) at or above a vertical angle of 80 above nadir does not numerically exceed 10% of the luminous flux (in lumens) of the lamp or lamps in the luminaire.

Dark Sky Compliant

Yes

Photocell

No

Wet Location

Suitable for exterior or interior location in which uncontrolled liquid may drip, splash or flow on or against electrical equipment.